?? ?????????????????????3.46?????
????:1??????????:?????
2?????
3??????
4?????vx
5?????qq
??6?19?? ?,6??19?,????3.46???,????,???,?????????????????????????7??(??????????)2.13???,????;????????????????????????????????4??(???)0.69??,?;????2????0.64????????????,????
??:????????????????????